Just finished building by PC. I have two 256gb SSDs that are Samsung 850 Pro. In the bios, I have both of them set up in RAID 0 and shows 510gb of storage. These are SATA SSDs by the way. I insert my USB with installation media, and when I go to download Windows, the drive doesn't show up at all. This is my first time doing RAID, but not my first time building. If anybody has an answer I would greatly appreciate it. Thanks.